Surface Modification of Polytetrafluoroethylene by Atmospheric Pressure Plasma-Grafted Polymerization
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Surface Modification of Polytetrafluoroethylene by Atmospheric Pressure Plasma‑Grafted Polymerization Chou‑Yuan Cheng1 · Fang‑Yi Chung1 · Pei‑Yuan Chou1 · Chun Huang1 Received: 17 March 2020 / Accepted: 27 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The aim of this study was to observe the atmospheric pressure plasma for polytetrafluoroethylene (PTFE) surface modification. The hydrophilicity of the effectively-anchored acrylic acid polymerization on the PTFE surfaces through atmospheric pressure plasmagrafted polymerization was examined using surface chemical composition analysis. The hydrophilic acrylic acid coating was created, via graft polymerization, onto a PTFE surface that was activated by the atmospheric pressure plasma. The photoemission plasma species in this plasma were identified by optical emission spectroscopy. The influences of atmospheric pressure plasma on the PTFE surface properties were also studied. We observed a significant increase in the surface free energy of the PTFE due to the atmospheric pressure plasma treatments. In this study, the changes in the chemical composition of this plasmagrafted, polymerized PTFE surfaces were also determined using FTIR, ESR, and XPS. It suggests that a specific level of surface wettability can be attained by tailor-designing the characteristics of the atmospheric pressure plasma-grafted, acrylic acid polymerization on the PTFE surface by adjusting the chemical composition and surface morphology, which are organized by the plasma surface activation and monomer concentration.
* Chun Huang [email protected] 1
Department of Chemical Engineering and Materials Science, Yuan Ze University, Chungli 32003, Taiwan
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Vol.:(0123456789)
Plasma Chemistry and Plasma Processing
Graphic Abstract
Linear Atmospheric Pressure Plasma F
FF
F F
F
F
PTFE substrate
Activated PTFE Air Exposure
COOH C=O COOH C=O C-O
CH2 = CH COOH
OH O
O
O
AAc Grafting Grafted PTFE substrate
Functionalized PTFE substrate
Plasma activated PTFE Untreated PTFE AAc grafting PTFE
Keywords Atmospheric pressure plasma · Plasma-grafted polymerization · Polytetrafluoroethylene · Surface modification
Introduction Polytetrafluoroethylene (PTFE), which is a fluorocarbon-based polymer with multiple carbon–fluorine bonds have a significant potential for aerospace, machine, food packaging, filtration, and clinical applications [1]. The behavior of the PTFE surfaces in various usages, interactions, and compatibilities for different purposes has been researched in many studies. Even though the dispersion and distribution of the PTFE materials are essential to improving its bulk characteristics, the hydrophobic surface nature of the PTFE limits the options for the processing development [2, 3]. To overcome these deficiencies, surface treatment and chemical functionalization of the PTFE have been successfully conducted [4]. However, the conventional chemical surface treatment processes suffer from major disadvantages such as contaminatio
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